diff --git a/ppx_trace.opam b/ppx_trace.opam
index 4344761..255e00d 100644
--- a/ppx_trace.opam
+++ b/ppx_trace.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.8"
+version: "0.9"
 synopsis: "A ppx-based preprocessor for trace"
 maintainer: ["Simon Cruanes"]
 authors: ["Simon Cruanes"]
diff --git a/trace-fuchsia.opam b/trace-fuchsia.opam
index 3951a3c..a584bc2 100644
--- a/trace-fuchsia.opam
+++ b/trace-fuchsia.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.8"
+version: "0.9"
 synopsis:
   "A high-performance backend for trace, emitting a Fuchsia trace into a file"
 maintainer: ["Simon Cruanes"]
diff --git a/trace-tef.opam b/trace-tef.opam
index 10a2640..bfe9b7d 100644
--- a/trace-tef.opam
+++ b/trace-tef.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.8"
+version: "0.9"
 synopsis:
   "A simple backend for trace, emitting Catapult/TEF JSON into a file"
 maintainer: ["Simon Cruanes"]
diff --git a/trace.opam b/trace.opam
index f0f39a0..a5e77b3 100644
--- a/trace.opam
+++ b/trace.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.8"
+version: "0.9"
 synopsis:
   "A stub for tracing/observability, agnostic in how data is collected"
 maintainer: ["Simon Cruanes"]